Wellington, CO 80536 Frost Dates
80536, near Wellington, CO: the frost window
Around 05/31 is the usual last spring frost, about 276 days away. Fall's first freeze usually shows up around 09/19, roughly 110 days after the last spring frost.
Zone 5b (-15 to -10°F average annual minimum) comes from the USDA Plant Hardiness Zone Map; the frost dates above are the 1991-2020 normal at the nearest reporting NOAA station for Wellington, not a forecast for this year.
Stretching the season past the first frost
Wellington's growing season runs out in roughly 3 weeks — a cold frame or greenhouse kit is the usual way to keep cool-weather crops going past the first frost.
The actual range around Wellington's last frost
05/31 is the middle of 30 years of NOAA records, not a promise. Getting tender plants in by 05/17 carries real risk, frost has hit that late in about 9 of 10 years here. Wait until 06/15 and only about 1 year in 10 sees frost after that.
Wellington against the rest of the dataset
About 110 days separate Wellington's last and first frost, putting it 39,500 of 40,283 ZIP codes nationally. Within CO, it ranks 507 of 624.
Learn more
Two guides worth reading on 80536: zone vs. frost date, on why Zone 5b and Wellington's frost date answer different questions, and the frost range, on how to read the range around Wellington's dates instead of trusting one.